CN1491488A - Interference Elimination Method and Device - Google Patents
Interference Elimination Method and Device Download PDFInfo
- Publication number
- CN1491488A CN1491488A CNA02804830XA CN02804830A CN1491488A CN 1491488 A CN1491488 A CN 1491488A CN A02804830X A CNA02804830X A CN A02804830XA CN 02804830 A CN02804830 A CN 02804830A CN 1491488 A CN1491488 A CN 1491488A
- Authority
- CN
- China
- Prior art keywords
- joint detection
- received signal
- signal
- interference
- detection operation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
- H04B1/7105—Joint detection techniques, e.g. linear detectors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Noise Elimination (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
路径选择单元(105a到105n)将通过从延迟分布中去除除了有效路径外的诸如噪声的信号并仅选择有效路径而得到的信道估计值输出到JD解调单元(106)，并将有效路径接收电平输出到乘法器(108a到108n)。JD解调单元(106)执行联合检测计算，并将线性计算结果与从延迟单元(103)输出的接收信号相乘。分配单元(107)为每个用户分配每个用户的软判决数据。纠错/解码单元(109a到109n)执行对该软判决数据的硬判决，以便得到每个用户的解调数据。
Path selection units (105a to 105n) output channel estimation values obtained by removing signals such as noise other than effective paths from delay profiles and selecting only effective paths to JD demodulation unit (106), and receive effective paths The levels are output to multipliers (108a to 108n). The JD demodulation unit (106) performs joint detection calculation, and multiplies the linear calculation result with the received signal output from the delay unit (103). An allocation unit (107) allocates soft decision data for each user for each user. Error correction/decoding units (109a to 109n) perform hard decisions on the soft decision data to obtain demodulated data for each user.
Description
Technical field
The present invention relates to interference blanking unit and method, and be particularly related to a kind of interference blanking unit and method, it is particularly suitable for using with radio receiver.
Background technology
Typically, comprise because the various interference of the interference that multipath fading brings, intersymbol interference and multichannel access interference etc. are obtained the method employing joint-detection of decoded signal and decoded by removal.
The joint-detection decoding is an example that utilizes the coding/decoding method of matrix operation.That is to say, in the joint-detection decoding, the using system matrix carries out the predetermined matrix computing, in this sytem matrix, the channel estimation value and the convolution algorithm result who distributes to the spreading code of described communication terminal (user) of each communication terminal (user) are provided with matrix-style, and the data division of matrix operation result and received signal multiplies each other, and disturbs and obtain decoded data so that eliminate.Therefore, aforesaid joint-detection decoding obtains from wherein having eliminated the decoded data that disturbs.Compare with the RAKE merging, the joint-detection decoding is characterised in that the high-performance of interference eliminated and the high reliability of decoded data.
But, use traditional joint-detection device, when the signal with high incoming level (that is: sign indicating number, frame) and signal (that is: sign indicating number, frame) with low incoming level stood joint-detection and decode, result, their signal level became identical in fact.These signal levels do not have the likelihood of reflected signal, and, when using the size (scale) of decoded result, can not improve the accuracy of error correction as the error correction decoding scheme of likelihood information.
Summary of the invention
Therefore, one of main purpose of the present invention is to provide a kind of interference blanking unit and method, when it utilizes the joint-detection decoded result in the error correction decoding scheme, has realized the error correction accuracy that improves.
To achieve these goals, the level that the interference blanking unit of the joint-detection decoding of execution received signal uses received signal is as likelihood, and the execution error correction, thereby has realized the receptivity that improves.
Description of drawings
Fig. 1 shows the block diagram according to the configuration of the interference blanking unit of the first embodiment of the present invention;
Fig. 2 A shows an example that postpones distribution (delay profile);
Fig. 2 B shows an example that postpones distribution;
Fig. 3 A shows the example in the path of being selected by the above-mentioned interference blanking unit of this embodiment;
Fig. 3 B shows the example in the path of being selected by the above-mentioned interference blanking unit of this embodiment;
Fig. 4 shows the example of the received signal of fluctuation up and down;
Fig. 5 shows the result's of the joint-detection computing in the above-mentioned interference blanking unit of this embodiment example;
Fig. 6 shows the example by the output of the above-mentioned interference blanking unit generation of this embodiment;
Fig. 7 shows the block diagram of the configuration of interference blanking unit according to a second embodiment of the present invention;
Fig. 8 shows the example of the received signal of fluctuation up and down;
Fig. 9 A shows the result's of the joint-detection computing in the above-mentioned interference blanking unit of this embodiment example;
Fig. 9 B shows the result's of the joint-detection computing in the above-mentioned interference blanking unit of this embodiment example;
Figure 10 A shows the example by the output of the above-mentioned interference blanking unit generation of this embodiment;
Figure 10 B shows the example by the output of the above-mentioned interference blanking unit generation of this embodiment.
Embodiment
The inventor will be by concentrating on following aspect, realize this instant invention: the joint-detection computing produces has the result of similarity signal level, thereby make the likelihood that is difficult to determine signal from its signal level, and, when using signal level as the error correction of the information of relevant likelihood, the accuracy of error correction can descend.
Essence of the present invention is: the interference blanking unit of carrying out the joint-detection decoding of received signal is used as likelihood by the level with received signal and carries out error correction, improves receptivity.
Now, embodiments of the invention are described with reference to the accompanying drawings.
(embodiment 1)
Here, use embodiments of the invention to describe a kind of situation, wherein, received signal stands joint-detection and calculates, assign weight to operation result according to incoming level, and use incoming level to carry out error correction, thereby realize the receiving feature of raising as likelihood information.
Fig. 1 shows the block diagram according to the configuration of the interference blanking unit of the first embodiment of the present invention.The interference eliminator 100 of Fig. 1 comprises wireless portion 101, A/D converter 102, delayer 103, MF part 104a～104n, path selector 105a～105n, JD decoder 106, distributor 107, multiplier 108a～108n and error correction decoder 109a～109n.
With reference to Fig. 1, wireless portion 101 receives wireless signal, it is carried out such as the wireless processing that converts base band frequency to, and received signal is outputed to A/D converter 102.A/D converter 102 is carried out the analog-to-digital conversion of received signal, and it is outputed to delayer 103 and MF part 104a～104n.The processing of delayer 103 delayed reception signals in JD decoder 106 regularly.MF part 104a～104n multiplies each other by the spreading code with received signal and each channel, produces respectively to postpone to distribute, and it is outputed to path selector 105a～105n.
By way of parenthesis, though foregoing description shows the configuration that comprises n MF part 104a～104n, also might be that single MF produces n configuration that postpones to distribute.
From postpone to distribute, path selector 105a～105n abandon except with the signal of corresponding those signals of active path, such as noise, and will export to JD decoder 106 by the channel estimation value that the selection of active path is obtained.In addition, path selector 105a～105n exports to multiplier 108a～108n with the incoming level among path selector 105a～105n.
Be provided for carrying out time averaging parts also can for path selector 105a～105n, so that feasible the distribution based on average delay carried out Path selection to postponing to distribute.
From distributor 107 soft-decision data being distributed to each user, then, is that multiplier 108a～108n is exported on the basis with each user.Multiplier 108a～108n multiplies each other user's soft-decision data with the incoming level of exporting from path selector 105a～105n, thereby assigns weight, and it is outputed to error correction decoder 109a～109n.
Below, with the signal processing in the interference blanking unit of description present embodiment.At first, in MF part 104a～104n, the spreading code of received signal and each channel multiplies each other, and postpones to distribute so that produce.Fig. 2 A and Fig. 2 B show the example that postpones distribution.In Fig. 2 A and Fig. 2 B, vertical axis is represented incoming level, and the trunnion axis express time.
It is to postpone an example distributing that the delay of Fig. 2 A distributes, and it is to obtain by received signal and spreading code corresponding to user 1 are multiplied each other.Similarly, it is to postpone an example distributing that the delay of Fig. 2 B distributes, and it is to obtain by received signal and spreading code corresponding to user 2 are multiplied each other.In the delay of Fig. 2 A distributed, active path P210 was in time t211, and active path P220 is in time t221, and active path P230 is in time t231, and remaining be interference components and noise component(s).
Similarly, in the delay of Fig. 2 B distributed, active path P240 was in time t241, and path P 250 is in time t251.Path selector 105a～105n selects active path from Fig. 2 A of showing the delay that comprises active path and distributing and Fig. 2 B.Fig. 3 A and Fig. 3 B show the example in the path that the interference blanking unit of present embodiment selects.In Fig. 3 A and Fig. 3 B, vertical axis is represented incoming level, and the trunnion axis express time.
Fig. 3 A shows a kind of situation, wherein, always selects active path in the received signal of user 1 channel.Fig. 3 A shows selected path, comprising: have incoming level L212 path P 210, have incoming level L222 path P 220, have the path P 230 of incoming level L232.Similarly, Fig. 3 B shows a kind of situation, wherein, selects active path from the received signal of user 2 channel.In Fig. 3 B, selected to have the path P 240 of incoming level L242 and have the path P 250 of incoming level L252.
In path selector 105a～105n, calculate the channel estimation value of above-mentioned active path.Then, JD decoder 106 is carried out the predetermined matrix computing by sytem matrix is applied to channel estimation value, and matrix operation result and received signal are multiplied each other, thereby obtains demodulation result.
In distributor 107, demodulation result is divided into the particular channel restituted signal.These restituted signals do not comprise the included information about incoming level in the active path shown in Fig. 3 A and Fig. 3 B.So in multiplier 108a～108n, restituted signal and incoming level value multiply each other, and are assigned with weight, like this, restituted signal has reflected incoming level.
For example, restituted signal can be on every frame basis, multiplies each other with the power summation of selected active path.Again for example, restituted signal can be on every frame basis, multiplies each other with the square root of the power summation of selected active path.
Incoming level changes between received signal owing to decline.For example, the influence of decline changes with the factor such as time of reception.Therefore, between good condition signal that receive, that have high incoming level and condition signal that receive, that have low incoming level in difference, the reliability difference of signal.By using the multiplication of incoming level value, received signal has reflected the information about incoming level, like this, just can use the error correction decoding such as Veterbi decoding, and its size of using modulation result is as likelihood information.
Fig. 4 shows the example of the received signal of fluctuation up and down.In Fig. 4, vertical axis is represented incoming level, and the trunnion axis express time.In Fig. 4, the influence of decline makes the incoming level of the signal fluctuation up and down along with the variation of time of each channel.For example, in the communication of adopting TDD (time division duplex), a plurality of time slots are set in a frame, and multiplexing signal from a plurality of channels.Send the signal of particular channel at corresponding time slot.Receive S412 in first frame, it is a time slot of the received signal that begins from t411, and, in second frame, receive the time slot S422 that begins from t421, and receiving slot S432, S442, S452 and S462 similarly.Here, the influence that the signal among the time slot S412 is declined is little, and its incoming level height.On the contrary, the signal among the time slot S422 has big decline, and its incoming level is low.
Therefore, the incoming level between the signal changes with time of reception, and the likelihood of signal also changes.When above-mentioned received signal stands the joint-detection computing, will obtain following result.Fig. 5 shows the result's of the joint-detection computing in the interference blanking unit of present embodiment example.In Fig. 5, vertical axis is represented signal level, and trunnion axis is represented the frame that receives.As shown in Figure 5, the joint-detection result calculated is in same level in fact, and does not consider the size of incoming level, thereby it can not reflect incoming level.
Demodulation has low incoming level in the result of the signal that t421 receives, and therefore, restituted signal has noise thereon.
Based on every frame, this joint-detection operation result and each incoming level value are multiplied each other.Fig. 6 shows the example by the output of the interference blanking unit generation of present embodiment.In Fig. 6, vertical axis is represented signal level, and trunnion axis is represented the frame that receives.In Fig. 6, the output of frame 1 is proportional with the incoming level of the signal of the time slot 412 that receives at the time of Fig. 4 t411.The output of frame 2 is proportional with the incoming level of the signal of the time slot 422 that receives at the time of Fig. 4 t421.
Then, error correction decoder 109a～109n uses this signal level as soft-decision-value, carries out the hard decision that receives data, and obtains demodulating data # 1～demodulating data #n of each user.
According to the interference blanking unit of present embodiment, the joint-detection decoded result of received signal has provided the result of the incoming level of reflection received signal, and therefore, when the joint-detection decoded result was applied to error correction coding, the accuracy of error correction had improved.
Though in above-mentioned explanation, assign weight to demodulation result in the stage more Zao than error correction decoder 109a～109n, but should not be seen as restriction, and can be by such configuration, realize identical effect: corresponding of the value that is in proportion of use and decoded result, in JD decoder 106, carry out weight allocation.
(embodiment 2)
Here, use the second embodiment of the present invention to describe a kind of situation, wherein, by being signal level, the execution joint-detection computing of basic standard received signal with every channel and carrying out, improve receptivity with the error correction decoding of incoming level as likelihood information.
Fig. 7 shows the block diagram of the configuration of interference blanking unit according to a second embodiment of the present invention.Give part distribution identical among this figure and the identical label among Fig. 1, and no longer further explain with Fig. 1.
The interference blanking unit of Fig. 7 comprises level regulator 701a～701n, JD decoder 702, error correction decoder 703, is with the difference of the interference blanking unit of Fig. 1: with every channel is that basic standardization will be transfused to the information of carrying out on the active path that joint-detection calculates.
In Fig. 7, the processing of delayer 103 delayed reception signals in the JD decoder 106 that will describe subsequently regularly.Path selector 105a～105n abandon except with the signal of corresponding those signals of active path, such as noise, and will export to level regulator 701a～701n by the channel estimation value that the selection of active path is obtained.And path selector 105a～105n exports to level regulator 701a～701n with the received signal of active path.
Level regulator 701a～701n is standardized in the active path of selecting among path selector 105a～105n according to the incoming level in path, and will export to JD decoder 702 about the information of standardized active path.More particularly, level regulator 701a～701n is based on every frame, with active path divided by the incoming level of active path and.For example, for the path of Fig. 3 A, press row expression formula (1), (2) and (3) come standardization P210, P220, P230:
L212′＝L212/(L212+L222+L232) (1)
L222′＝L222/(L212+L222+L232) (2)
L232′＝L232/(L212+L222+L232) (3)
Wherein, L212 ', L222 ', L232 ' represent the incoming level of standardized P210, P220 and P230 respectively.
Below, with the signal processing in the interference blanking unit of description present embodiment.Fig. 8 shows the example of the received signal of fluctuation up and down.In Fig. 8, vertical axis is represented incoming level, and the trunnion axis express time.In Fig. 8, the influence of decline makes the incoming level of the signal fluctuation up and down along with the variation of time of each channel, wherein, use the up and down fluctuations of 801 expressions about user 1 incoming level, and 802 expressions is about the fluctuation up and down of user 2 incoming level.Unlike Fig. 4 that a channel signal only has been described, use Fig. 8 to explain the situation that is generalized to a plurality of channels.
For example, in the communication of adopting TDD (time division duplex), a plurality of time slots are set in a frame, and multiplexing signal from a plurality of channels.Signal with reference to user 1 channel receives S812 in first frame, it is a time slot since the received signal of time t811, receives the time slot S822 that begins from t821 in second frame, and receiving slot S832, S842, S852 and S862 similarly.
And, signal with reference to user 2 channel receives S813 in first frame, it is a time slot since the received signal of time t811, in second frame, receive the time slot S823 that begins from t821, and receiving slot S833, S843, S853 and S863 similarly.
Here, the influence that the signal among the time slot S812 is declined is little, and its incoming level height.On the contrary, the signal among the time slot S822 is declined by the earth, and its incoming level is low.Similarly, the signal among the time slot S823 has big decline, and its incoming level is low, and on the contrary, the influence that the signal among the time slot S823 is declined is little, and its incoming level height.
Therefore, to another signal, incoming level changes with time of reception from a signal, and the likelihood of signal also changes.When above-mentioned received signal stands the joint-detection computing, will obtain following result.Fig. 9 A and Fig. 9 B show the result's of the joint-detection computing in the interference blanking unit of present embodiment example.In Fig. 9 A and Fig. 9 B, vertical axis is represented signal level, and trunnion axis is represented the frame that receives.Fig. 9 A shows the joint-detection operation result with user 1 the corresponding signal of channel, and Fig. 9 B shows the joint-detection operation result with user 2 the corresponding signal of channel.
Shown in Fig. 9 A and Fig. 9 B, these joint-detection result calculated are in same level nearly, and no matter the size of incoming level, thus it can not reflect incoming level.With reference to 1 signal of the channel among Fig. 9 A, show the result of the signal that demodulation receives at t821 by frame 2, and low incoming level shows this restituted signal and comprises noise.Similarly,, show the result of demodulation, and low incoming level shows restituted signal and comprises noise at the signal that t824 received by frame 4 with reference to the signal of the channel among Fig. 9 B 1.
Based on every frame, this joint-detection operation result and incoming level value are multiplied each other.Figure 10 A and 10B show the example by the output of the above-mentioned interference blanking unit generation of present embodiment.In Figure 10 A and 10B, vertical axis is represented signal level, and trunnion axis is represented the frame that receives.The signal of user 1 channel stands the joint-detection computing, and the value of its result and incoming level multiplies each other, and has just become the signal shown in Figure 10 A.The signal of user 2 channel stands the joint-detection computing, and the value of its result and incoming level multiplies each other, and has just become the signal shown in Figure 10 B.
In Figure 10 A, the incoming level of the signal of the time slot 812 that the output of frame 1 and timing t 811 at Fig. 8 receive is proportional.The incoming level of the signal of the time slot 822 that the output of frame 2 and timing t 821 at Fig. 8 receive is proportional.Similarly, in Figure 10 B, the output of frame 1 is proportional with the incoming level of the signal of the time slot 813 that receives at the time of Fig. 8 t811.The output of frame 2 is proportional with the incoming level of the signal of the time slot 823 that receives at the time of Fig. 8 t821.
Then, error correction decoder 109a～109n uses this signal level as soft-decision-value, carries out the hard decision that receives data, and obtains demodulating data # 1～demodulating data #n of each user.
Thereby the interference blanking unit of present embodiment is applied to the received signal of standardized RX path level with the joint-detection decoding, so when using the error correction decoding scheme of using the joint-detection decoded result, improved the accuracy of error correction.
In addition, the interference blanking unit of first embodiment needs simple calculations, such as demodulation result being multiply by and the proportional value of incoming level.But, serve as that this multiplication that carry out on the basis has produced big amount of calculation with every symbol.The interference blanking unit of second embodiment need be used for standardized than complex calculations, yet, suppose with every time slot to serve as that the basis uses channel estimation value to carry out computing, amount of calculation is little.
In the time of in being combined in base station apparatus and mobile station apparatus, interference blanking unit of the present invention can be realized identical effect.
In addition, interference blanking unit of the present invention can adopt such configuration, wherein, each above-mentioned is a circuit, and this circuit relevant with Base-Band Processing is installed on the IC (integrated circuit) such as DSP (Digital Signal Processing) and LSI (large scale integrated circuit), and still can realize identical effect.
By above-mentioned explanation, can obviously find out: according to interference blanking unit of the present invention and method, received signal stands the joint-detection decoding, and its result has reflected the incoming level of received signal, when the error correction decoding scheme was used the joint-detection decoded result, the accuracy of error correction had improved like this.And according to interference blanking unit of the present invention and method, the received signal of standardized incoming level stands the joint-detection decoding, so that when the error correction decoding scheme is used the joint-detection decoded result, improve the accuracy of error correction.
Utilizability on the industry
The present invention is applicable to communicator and the base station apparatus of the signal that receives a plurality of communication parties' transmissions.
Claims (11)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001242798A JP3814502B2 (en) | 2001-08-09 | 2001-08-09 | Interference canceling apparatus and interference canceling method |
| JP242798/2001 | 2001-08-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1491488A true CN1491488A (en) | 2004-04-21 |
| CN100495935C CN100495935C (en) | 2009-06-03 |
Family
ID=19073014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB02804830XA Expired - Fee Related CN100495935C (en) | 2001-08-09 | 2002-08-05 | Interference Elimination Method and Device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7299026B2 (en) |
| EP (1) | EP1349288B1 (en) |
| JP (1) | JP3814502B2 (en) |
| CN (1) | CN100495935C (en) |
| WO (1) | WO2003017511A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1787392A (en) * | 2005-12-16 | 2006-06-14 | 凯明信息科技股份有限公司 | Timing tracking and trapping device |
| CN101668330B (en) * | 2008-06-04 | 2012-11-21 | 联发科技股份有限公司 | Signal receiving device, signal receiving method and global mobile communication system telephone |
| CN104065451A (en) * | 2013-03-20 | 2014-09-24 | 中兴通讯(美国)公司 | Soft Maximum Likelihood Sequence Estimation In Digital Communication |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1661947B (en) * | 2004-02-26 | 2010-12-01 | 大唐移动通信设备有限公司 | United detection method and equipment for retransmission signals of CDMA |
| CN100401646C (en) | 2004-09-24 | 2008-07-09 | 大唐移动通信设备有限公司 | Multi region combined detection method of time gap code division multi address system |
| US9378835B2 (en) * | 2008-09-30 | 2016-06-28 | Seagate Technology Llc | Methods and apparatus for soft data generation for memory devices based using reference cells |
| US8105111B2 (en) * | 2009-08-31 | 2012-01-31 | Hon Hai Precision Ind. Co., Ltd. | Electrical connector assembly having improved shielding shell |
| US9292377B2 (en) | 2011-01-04 | 2016-03-22 | Seagate Technology Llc | Detection and decoding in flash memories using correlation of neighboring bits and probability based reliability values |
| US9502117B2 (en) | 2011-03-14 | 2016-11-22 | Seagate Technology Llc | Cell-level statistics collection for detection and decoding in flash memories |
| CN102739283A (en) * | 2011-04-07 | 2012-10-17 | 联发科技（新加坡）私人有限公司 | Combined detection method based on active code channel selection in time division synchronous code division multiple access receiver |
| US9124397B2 (en) * | 2013-03-15 | 2015-09-01 | Samsung Electronics Co., Ltd. | Wireless communication system with interference mitigation mechanism and method of operation thereof |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4852090A (en) * | 1987-02-02 | 1989-07-25 | Motorola, Inc. | TDMA communications system with adaptive equalization |
| US5740208A (en) * | 1993-06-25 | 1998-04-14 | Roke Manor Research Limited | Interference cancellation apparatus for mitigating the effects of poor affiliation between a base station and a mobile unit |
| US5724378A (en) * | 1994-12-13 | 1998-03-03 | Nit Mobile Communications Network, Inc. | CDMA multiuser receiver and method |
| JP2914618B2 (en) | 1994-12-13 | 1999-07-05 | エヌ・ティ・ティ移動通信網株式会社 | CDMA multi-user receiving apparatus and method |
| KR100271120B1 (en) * | 1995-11-29 | 2000-11-01 | 다치카와 게이지 | Diversity receiver and its control method |
| US5757791A (en) * | 1996-04-18 | 1998-05-26 | American Wireless Technology, Inc. | Multistage linear receiver for DS-CDMA systems |
| US5768307A (en) * | 1996-09-13 | 1998-06-16 | Telefonaktiebolaget Lm Ericsson | Coherent demodulation with decision-directed channel estimation for digital communication |
| US5933768A (en) * | 1997-02-28 | 1999-08-03 | Telefonaktiebolaget L/M Ericsson | Receiver apparatus, and associated method, for receiving a receive signal transmitted upon a channel susceptible to interference |
| DE19724027C2 (en) * | 1997-06-06 | 1999-09-30 | Siemens Ag | Method and arrangement for receiving data |
| SG77607A1 (en) * | 1997-08-26 | 2001-01-16 | Univ Singapore | A multi-user code division multiple access receiver |
| JPH11251959A (en) * | 1998-03-05 | 1999-09-17 | Fujitsu Ltd | Interference canceller device and wireless communication device |
| US6144710A (en) * | 1998-04-23 | 2000-11-07 | Lucent Technologies, Inc. | Joint maximum likelihood sequence estimator with dynamic channel description |
| US6728302B1 (en) * | 1999-02-12 | 2004-04-27 | Texas Instruments Incorporated | STTD encoding for PCCPCH |
| JP2000261412A (en) | 1999-03-06 | 2000-09-22 | Matsushita Electric Ind Co Ltd | Interference signal eliminating device |
| EP1039662A1 (en) * | 1999-03-25 | 2000-09-27 | Alcatel | Improvements to a telecommunication system using code division multiple access (CDMA) |
| KR100609128B1 (en) * | 1999-07-12 | 2006-08-04 | 에스케이 텔레콤주식회사 | Apparatus and method for measuring call quality in mobile communication systems |
| US6963546B2 (en) * | 2000-03-15 | 2005-11-08 | Interdigital Technology Corp. | Multi-user detection using an adaptive combination of joint detection and successive interface cancellation |
| JP3424748B2 (en) * | 2000-05-25 | 2003-07-07 | 日本電気株式会社 | CDMA receiver and rate matching processing method |
| US6741637B1 (en) * | 2000-06-22 | 2004-05-25 | Golden Bridge Technology, Inc. | Method and apparatus of joint detection of a CDMA receiver |
| JP4076202B2 (en) * | 2000-08-07 | 2008-04-16 | 富士通株式会社 | Spread spectrum signal receiver and receiving method |
| US6842476B2 (en) * | 2001-02-09 | 2005-01-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Co-channel interference canceller |
| US6584143B2 (en) * | 2001-03-02 | 2003-06-24 | Motorola, Inc. | Method and apparatus for joint detection of a coded signal in a CDMA system |
| WO2004097803A2 (en) * | 2003-04-25 | 2004-11-11 | Xm Satellite Radio Inc. | System and method for providing recording and playback of digital media content |
-
2001
- 2001-08-09 JP JP2001242798A patent/JP3814502B2/en not_active Expired - Fee Related
-
2002
- 2002-08-05 WO PCT/JP2002/007958 patent/WO2003017511A1/en active Application Filing
- 2002-08-05 US US10/466,834 patent/US7299026B2/en not_active Expired - Lifetime
- 2002-08-05 CN CNB02804830XA patent/CN100495935C/en not_active Expired - Fee Related
- 2002-08-05 EP EP20020753227 patent/EP1349288B1/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1787392A (en) * | 2005-12-16 | 2006-06-14 | 凯明信息科技股份有限公司 | Timing tracking and trapping device |
| CN101668330B (en) * | 2008-06-04 | 2012-11-21 | 联发科技股份有限公司 | Signal receiving device, signal receiving method and global mobile communication system telephone |
| CN104065451A (en) * | 2013-03-20 | 2014-09-24 | 中兴通讯(美国)公司 | Soft Maximum Likelihood Sequence Estimation In Digital Communication |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003060517A (en) | 2003-02-28 |
| WO2003017511A1 (en) | 2003-02-27 |
| EP1349288A4 (en) | 2009-12-02 |
| US20040058713A1 (en) | 2004-03-25 |
| EP1349288B1 (en) | 2011-10-26 |
| EP1349288A1 (en) | 2003-10-01 |
| CN100495935C (en) | 2009-06-03 |
| US7299026B2 (en) | 2007-11-20 |
| JP3814502B2 (en) | 2006-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1156111C (en) | Interference signal removal device, base station device, and interference signal removal method | |
| CN1241332C (en) | Communication terminal apparatus and demodulation method | |
| CN1113482C (en) | Method and apparatus for intersymbol interference reduction using array processing of diversity signals | |
| KR101146815B1 (en) | Transmission structure supporting multi-user scheduling and mimo transmission | |
| CN1242564C (en) | Forward link power control in cellular system using NT/IO values | |
| CN1110150C (en) | Interference signal cancellation system | |
| CN1264283C (en) | Method and appts. for processing received signal in communications system | |
| CN1162990C (en) | Wireless base station device and wireless communication method | |
| CN1291017A (en) | Transmitting receiver | |
| CN1366753A (en) | Optimization of cannel equalizer | |
| CN1993955A (en) | Wireless communication system with configurable cyclic prefix length | |
| CN1138808A (en) | CDMA multi-user receiver and method | |
| CN1671072A (en) | Method and apparatus for time-division power assignments in a wireless communication system | |
| CN1491488A (en) | Interference Elimination Method and Device | |
| CN1640019A (en) | Radio communication system and scheduling method | |
| CN111030771B (en) | User equipment selection method in non-orthogonal multiple access system and base station thereof | |
| CN1926776A (en) | Mixed rake/equalizer receiver used for spread-spectrum system | |
| CN1540882A (en) | Wireless communication device and method using multiple transmit/receive antenna system | |
| CN1649337A (en) | OFDM communication system and method | |
| CN1327648A (en) | Wireless base station system, and wireless transmission method | |
| CN1265794A (en) | Method and radio station for transmitting data | |
| CN1638373A (en) | Apparatus and method for canceling interference signal in an orthogonal frequency division multiplexing system using multiple antennas | |
| CN1319289A (en) | Method and apparatus for radio reception | |
| CN1961498A (en) | Communication signal equalization systems and methods | |
| CN1159858C (en) | CDMA receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: MATSUSHITA ELECTRIC (AMERICA) INTELLECTUAL PROPERT Free format text: FORMER OWNER: MATSUSHITA ELECTRIC INDUSTRIAL CO, LTD. Effective date: 20140716 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140716 Address after: California, USA Patentee after: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA Address before: Osaka Japan Patentee before: Matsushita Electric Industrial Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20170524 Address after: Delaware Patentee after: III Holdings 12 LLC Address before: California, USA Patentee before: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 Termination date: 20180805 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |